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The Mi-ray features a concept
“mid-electric” propulsion system, located primarily behind and
beneath the driver, that maximizes performance and fuel
efficiency.
The Mi-ray is propelled by two
front-mounted 15-kW electric motors for quick acceleration and
zero emissions in urban driving. The motors are powered by a
1.6-kWh lithium-ion battery that is charged through regenerative
braking energy. The Mi-ray has the capability of being switched
from front-wheel drive to rear-wheel drive.
For performance driving, the
Mi-ray’s 1.5-liter four-cylinder turbocharged engine combines
with the electric motors, providing spirited torque control to
both the left and right wheels as needed. The high-tech engine,
mounted behind the cockpit, drives the rear wheels while
seamlessly integrating electrification technology that defines a
new standard in the compact roadster segment.
A dual-clutch transmission (DCT)
enables a reduction in the powertrain’s size by eliminating the
torque converter. Shifts are quick and firm. The shift pattern
has been tuned for improved top speed in performance mode. A
start-stop system works in conjunction with the DCT.
“The propulsion concept fits
perfectly with the rest of the vehicle, delivering big
performance in a small footprint, on the road and in the
environment,” said Arcamone. “By combining GM propulsion
technology and visionary design, the Mi-ray points to the future
of Chevrolets around the globe – expressive, youthful and
entertaining.”
Photos: Chevrolet
(March 31, 2011)
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